then we solve the reduced system iteratively by exploiting specifically designed preconditioning techniques. The analysis …

an effective preconditioning technique is proposed and refined convergence bounds derived, which results in a practical …

the topic focused on the iterative Landweber method. In addition, preconditioning techniques previously proposed for …

We consider an iterative preconditioning technique for non-convex large scale optimization. First, we refer to the … used at the current outer iteration. An extensive numerical experience shows that the proposed preconditioning strategy …